Feel good, bad, sad, happy etc?
Depends if I like or dislike the people who acquire my presence.
If they are nasty, I don't want them to know about my existence, if I like them, it feels like honor/good feelings.
Sad. Bored. Angry. I try to ignore anyone who invades the space within a twenty foot radius of myself, as newly appearing entities in my environment tend to make me observe or retract. Often times nobody is interesting enough to observe, and for some reason my stone-like presence does not deter them at all from attempting to engage me.